Hi...on Vector7Light lxde tray volume, the control adjusts the alsa master volume, is it possible to change it to headphone? feel like I did this before but the panel volume control settings is grayed out..is it a config file somewhere..thanks

As this unit appears to use the headphone volume, I can open a terminal and type alsamixer and adjust the headphone volume. I chose to add the Volti app from the repository via gslapt. This adds the volti app to the menu for lxde and when clicked adds a volume control to the tray which with a left click opens a volume control and with a right click opens a menu. The preferences option has a hardware tab that allows one to choose which volume will be controlled by the left click control. the control is closed during log out and requires start from the menu like any other app but is currently a solution. perhaps it can be added to the startup but have not figured that out yet.

edit: added a volti.desktop to .config/autostart which seems to work so will mark as solved